Is writing unique Id directly in esp32 using esptool.py possible ??

[Karim1993]

Is i possible to write a unique id (with 64 to 128 bytes size) into a specific location in the esp32 internal flash memory without effecting the application code using the esptool.py.

[OutOfLine]

If I understand you right the 'Non-volatile storage library NVS' could be a good solution
I tried it once to store a name string of sound-light installations, and it worked fine
( I did #include <Preferences.h> to make it easy)

If nvs entry size (32bytes, I think) is too small you can use multiple entries for your data